12291890820560 has 80 divisors (see below), whose sum is σ = 30779640976896. Its totient is φ = 4538155375104.

The previous prime is 12291890820557. The next prime is 12291890820647. The reversal of 12291890820560 is 6502809819221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11778767 + ... + 12779793.

Almost surely, 2^{12291890820560} is an apocalyptic number.

12291890820560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12291890820560 is an abundant number, since it is smaller than the sum of its proper divisors (18487750156336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12291890820560 is a wasteful number, since it uses less digits than its factorization.

12291890820560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012860 (or 1012854 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 53.

The spelling of 12291890820560 in words is "twelve trillion, two hundred ninety-one billion, eight hundred ninety million, eight hundred twenty thousand, five hundred sixty".